Review Article. Theory of digital imaging from orbital synthetic-aperture radar

Barber, B.C.

doi:10.1080/01431168508948262

Cited by 132 publications

(49 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the possibility of correlating SAR data in the time domain has already been discussed by Barber [13] and later by Courlander and McDomough [14] and Soumekh [12], most of the attention in the SAR processing community has been directed toward more efficient frequency-domain focusing techniques. These algorithms are often designed for processing SAR data of a particular sensor or sensor type.…”

Section: B Tdbp Processingmentioning

confidence: 99%

Focusing of Airborne Synthetic Aperture Radar Data From Highly Nonlinear Flight Tracks

Frey

Magnard

Ruegg

et al. 2009

IEEE Trans. Geosci. Remote Sensing

141

View full text Add to dashboard Cite

Standard focusing of data from synthetic aperture radar (SAR) assumes a straight recording track of the sensor platform. Small nonlinearities of airborne platform tracks are corrected for during a motion-compensation step while maintaining the assumption of a linear flight path. This paper describes the processing of SAR data acquired from nonlinear tracks, typical of sensors mounted on small aircraft or drones flying at low altitude. Such aircraft do not fly along straight tracks, but the trajectory depends on topography, influences of weather and wind, or the shape of areas of interest such as rivers or traffic routes. Two potential approaches for processing SAR data from such highly nonlinear flight tracks are proposed, namely, a patchwise frequency-domain processing and mosaicking technique and a time-domain back-projection-based technique. Both are evaluated with the help of experimental data featuring tracks with altitude changes, a double bend, a 90 circ curve, and a linear flight track. In order to assess the quality of the focused data, close-ups of amplitude images are compared, impulse response functions of a point target are analyzed, and the coherence is evaluated. The experimental data were acquired by the German Aerospace Center's E-SAR L-band system.

show abstract

Section: B Tdbp Processingmentioning

confidence: 99%

Focusing of Airborne Synthetic Aperture Radar Data From Highly Nonlinear Flight Tracks

Frey

Magnard

Ruegg

et al. 2009

IEEE Trans. Geosci. Remote Sensing

141

View full text Add to dashboard Cite

show abstract

“…We have assumed the start-stop approximation [17] to be valid, which is reasonable in an airborne system. For GBP we define the backprojected signal ( )…”

Section: B the Lbpmentioning

confidence: 99%

“…For a stationary target (17) gives the distance between the effective antenna centers which is expected. The minimum range will in each channel be separated by…”

Section: Focusing Moving Targetsmentioning

confidence: 99%

Detection of moving targets in wideband SAR

Pettersson

2004

IEEE Trans. Aerosp. Electron. Syst.

View full text Add to dashboard Cite

Abstract-A likelihood ratio is proposed for moving target detection in a wide band (WB) SAR system. For this paper, WB is defined as any systems having a large fractional bandwidth, i.e. an ultra wide frequency band combined with a wide antenna beam. The developed method combines time domain fast backprojection SAR processing methods with moving target detection using space-time processing. The proposed method reduces computational load when sets of relative speeds can be tested using the same clutter suppressed sub-aperture beams. The proposed method is tested on narrow band radar data.

show abstract

“…Although the time domain method is the best in theory, it requires huge computation [6]. Rodriguez-Cassola et al [7] proposed an efficient time domain imaging algorithm that has small computational burden respect to the direct backprojection (DBP) algorithm and high accuracy for the general time-varying configuration.…”

Section: Introductionmentioning

confidence: 99%

Focusing of tandem bistatic SAR data using the chirp-scaling algorithm

Chen

Xing

Zhou

et al. 2013

EURASIP J. Adv. Signal Process.

View full text Add to dashboard Cite

Based on an exact analytical bistatic point target spectrum, an efficient chirp-scaling algorithm is proposed to correct the range cell migration of different range gates to the one of the reference range for tandem bistatic synthetic aperture radar data processing. The length of the baseline (baseline to range ratio) does not give a direct influence to the proposed algorithm, which can be applied to the processing of tandem bistatic data with a large baseline even when the baseline is equal to the range. No interpolation is needed during the entire processing, only fast Fourier transforms and phase multiplications are needed, which result in efficiency. The validity of the proposed algorithm has been verified by simulated experiments.

show abstract

Review Article. Theory of digital imaging from orbital synthetic-aperture radar

Cited by 132 publications

References 9 publications

Focusing of Airborne Synthetic Aperture Radar Data From Highly Nonlinear Flight Tracks

Focusing of Airborne Synthetic Aperture Radar Data From Highly Nonlinear Flight Tracks

Detection of moving targets in wideband SAR

Focusing of tandem bistatic SAR data using the chirp-scaling algorithm

Contact Info

Product

Resources

About